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Osmosis And Diffusion Lab Report

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The purpose of this experiment was to demonstrate how diffusion and osmosis moves across a dialysis membrane. The sub-purpose was to determine if the sucrose solution, that was in dialysis tubing would leak into the distilled water. The hypothesis states that if a sucrose solution, in dialysis tubing, is placed into a beaker filled with distilled water the net movement of sucrose will be into or out of the dialysis bag. The null hypothesis states that if the sucrose solution in a dialysis bags mass may change after taking it out of the water each time to be weighted between each 15-minute increment 5 different times. After 15, 30, 45 and 60 minutes it can be concluded that weighing the sucrose solution in the dialysis bag increased in weight after each increment.

Keywords: Diffusion, Osmosis, Dialysis bag, Sucrose solution, Distilled water

Introduction …show more content…
All cells within the body contain selectively permeable membranes. Selectively permeable membranes allow things to pass into and out of cells. When molecules move from an area of high concentration to an area of low concentration, this is called diffusion. Diffusion is a property of a liquid or gas. Diffusion allows molecules to move down the concentration gradient in a solution. Diffusion is the random mixing of particles, which produces kinetic energy. The plasma membrane is said to be the most important feature of a living cell. When dealing with osmosis, water crosses membranes from regions of high water concentration to areas with low water concentration. Osmosis involves a semi-permeable membrane (Allen, C. & Harper, V.

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